CN217152507U - Filter protection device, hydraulic system and vehicle - Google Patents
Filter protection device, hydraulic system and vehicle Download PDFInfo
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- CN217152507U CN217152507U CN202220975273.8U CN202220975273U CN217152507U CN 217152507 U CN217152507 U CN 217152507U CN 202220975273 U CN202220975273 U CN 202220975273U CN 217152507 U CN217152507 U CN 217152507U
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Abstract
The utility model provides a filter protection device, hydraulic system and vehicle. A filter protection device, comprising: the filter and the differential pressure overflow valve are respectively connected with the hydraulic oil tank through pipelines, and the differential pressure overflow valve is connected with the filter in parallel. When the pressure difference between the inlet and the outlet of the filter is larger than the set pressure of the differential pressure overflow valve, the differential pressure overflow valve is opened, the hydraulic system is unloaded, and the hydraulic oil directly returns to the oil tank. The filter screen of the protection filter can not be damaged when the front-back pressure difference is large, so that impurities are prevented from entering a downstream hydraulic system to pollute downstream parts, and the damage of downstream hydraulic components is avoided. Meanwhile, if the user does not replace the filter element, the downstream parts of the whole hydraulic system stop working, and the user is forced to replace the filter element.
Description
Technical Field
The utility model relates to a filter protection equipment technical field especially relates to a filter protection device, hydraulic system and vehicle.
Background
As is well known, most hydraulic system faults are caused by oil contamination of the hydraulic system, so that it is important to maintain the cleanliness of the hydraulic system during use. The high-pressure filter is an important auxiliary element for filtering impurities in high-pressure oil discharged from the pump and ensuring the cleanliness of the oil. The main sources of the hydraulic oil impurities include the following aspects, namely the initial impurities, the impurities entering the hydraulic system from the outside, the impurities generated in the operation process of the hydraulic system, the impurities generated by the oxidation and deterioration of the hydraulic oil and the like. Typically, users place high pressure filters between gear pumps and valves to protect the relatively delicate valves and actuators from contaminants. After the high-pressure filter is used for a period of time, the filter element needs to be replaced so as to ensure the filtering effect. Some users forget to replace the filter element, and even some users often have the phenomenon that the filter element is not replaced timely in order to save money and time, so that a large amount of impurities finally enter a downstream hydraulic system to cause the damage of downstream hydraulic components.
In the use process of the high-pressure filter, no good protection system exists, and downstream parts can be effectively protected after the high-pressure filter fails.
The high pressure filter system that uses at present has two kinds of schemes to protect the high pressure filter: the signal adding and sending device gives an alarm once the pressure difference reaches a set value, and reminds a user to replace the filter element. And a bypass valve is added, and the bypass valve is opened when the system pressure difference reaches a set value, so that the filter screen is prevented from being broken due to overlarge pressure difference, and the filter is prevented from being damaged.
1) The adding and transmitting device only reminds users, but some users can directly pull out the power supply of the transmitting device after hearing the alarm, and the filter element is not removed and replaced in time, so that impurities enter the downstream, and the downstream components are damaged.
2) Impurities can enter a downstream hydraulic system through the bypass valve after the bypass valve is opened, so that downstream components are damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to prior art not enough, provide a filter protection device, hydraulic system and vehicle.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a filter protection device, comprising: the filter and the differential pressure overflow valve are respectively connected with the hydraulic oil tank through pipelines, and the differential pressure overflow valve is connected with the filter in parallel.
Adopt the utility model discloses technical scheme's beneficial effect is: when the pressure difference between the inlet and the outlet of the filter is larger than the set pressure of the differential pressure overflow valve, the differential pressure overflow valve is opened, the hydraulic system is unloaded, and the hydraulic oil directly returns to the oil tank. The filter screen of the protection filter can not be damaged when the front-back pressure difference is large, so that impurities are prevented from entering a downstream hydraulic system to pollute downstream parts, and the damage of downstream hydraulic components is avoided. Meanwhile, if the filter element is not replaced by a user, the downstream parts of the whole hydraulic system stop working, and the user is forced to replace the filter element.
Furthermore, one end of the filter is connected with the hydraulic oil tank through a pipeline, the first end of the differential pressure overflow valve is connected with one end of the filter through a pipeline, the second end of the differential pressure overflow valve is connected with the other end of the filter through a pipeline, and the third end of the differential pressure overflow valve is connected with the hydraulic oil tank through a pipeline.
The beneficial effect of adopting the further technical scheme is that: the pressure difference between the inlet and the outlet of the filter is increased along with the gradual increase of the pollutant particles contained in the filter, when the front and rear pressure difference of the filter is increased to a set value, the pressure difference overflow valve is opened, the system is unloaded, hydraulic oil returns to the oil tank through the pressure difference overflow valve, and downstream components of the hydraulic system stop working, so that the filter is protected from being damaged, and the filter is prevented from being failed to pollute the downstream components.
Further, one end of the filter is connected with the hydraulic oil tank through a pump.
The beneficial effect of adopting the further technical scheme is that: the pump is a system power element and is used for providing high-pressure oil for the system. The filter is connected with the pump and downstream components and parts and plays a role in filtering oil.
Further, the pump is connected with the hydraulic oil tank through an oil suction filter.
The beneficial effect of adopting the further technical scheme is that: the oil suction filter is arranged and used for filtering oil from the oil tank to the pump and ensuring the cleanliness of the oil entering the pump. The oil tank plays the roles of storing hydraulic working media required by the hydraulic transmission system, dissipating heat, precipitating pollutants and the like.
Further, the other end of the filter is connected with a one-way valve, and the one-way valve is used for being connected with a downstream hydraulic system.
The beneficial effect of adopting the further technical scheme is that: and the check valve is used for preventing the oil liquid of the hydraulic system from flowing back to the filter.
Furthermore, the utility model provides a hydraulic system, including above-mentioned arbitrary one a filter protection device still includes: the filter, the hydraulic oil tank, the hydraulic motor and the oil cylinder are respectively connected with the multi-way valve through pipelines.
Adopt the utility model discloses technical scheme's beneficial effect is: when the pressure difference between the inlet and the outlet of the filter is larger than the set pressure of the differential pressure overflow valve, the differential pressure overflow valve is opened, the hydraulic system is unloaded, and the hydraulic oil directly returns to the oil tank. The filter screen of the protection filter can not be damaged when the front-back pressure difference is large, so that impurities are prevented from entering a downstream hydraulic system to pollute downstream parts, and the damage of downstream hydraulic components is avoided. Meanwhile, if the filter element is not replaced by a user, the downstream parts of the whole hydraulic system stop working, and the user is forced to replace the filter element.
Additionally, the utility model also provides a vehicle, including the aforesaid a hydraulic system.
Adopt the utility model discloses technical scheme's beneficial effect is: when the pressure difference between the inlet and the outlet of the filter is larger than the set pressure of the differential pressure overflow valve, the differential pressure overflow valve is opened, the hydraulic system is unloaded, and the hydraulic oil directly returns to the oil tank. The filter screen of the protection filter can not be damaged when the front-back pressure difference is large, so that impurities are prevented from entering a downstream hydraulic system to pollute downstream parts, and the damage of downstream hydraulic components is avoided. Meanwhile, if the filter element is not replaced by a user, the downstream parts of the whole hydraulic system stop working, and the user is forced to replace the filter element.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a filter protection device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a hydraulic system provided by an embodiment of the present invention.
The reference numbers illustrate: 1. a downstream hydraulic system; 2. a filter; 3. a differential pressure relief valve; 4. a hydraulic oil tank; 5. a pump; 6. an oil absorption filter; 7. a one-way valve; 8. a multi-way valve; 9. a hydraulic motor; 10. and an oil cylinder.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a filter protection device, which includes: the filter 2, the differential pressure overflow valve 3 and the hydraulic oil tank 4 are used for being connected with a downstream hydraulic system 1, the filter 2 and the differential pressure overflow valve 3 are respectively connected with the hydraulic oil tank 4 through pipelines, and the differential pressure overflow valve 3 is connected with the filter 2 in parallel.
Adopt the utility model discloses technical scheme's beneficial effect is: when the pressure difference between the inlet and the outlet of the filter is larger than the set pressure of the differential pressure overflow valve, the differential pressure overflow valve is opened, the hydraulic system is unloaded, and the hydraulic oil directly returns to the oil tank. The filter screen of the protection filter can not be damaged when the front-back pressure difference is large, so that impurities are prevented from entering a downstream hydraulic system to pollute downstream parts, and the damage to downstream hydraulic components is avoided. Meanwhile, if the filter element is not replaced by a user, the downstream parts of the whole hydraulic system stop working, and the user is forced to replace the filter element.
Wherein the filter may be a high pressure filter. The control principle and method of the differential pressure overflow valve are prior art and will not be described in detail herein.
The preset pressure value range of the differential pressure overflow valve can be 4-10Bar, and the preferable preset pressure value is 6 Bar.
In the pressure difference overflow valve in the figure, the lower dotted line represents the filter inlet hydraulic control, the upper dotted line represents the filter outlet hydraulic control, and when the lower hydraulic control force is larger than the sum of the upper hydraulic control force and the spring force, the pressure difference overflow valve is opened. When the pressure difference between the inlet and the outlet of the filter reaches the set pressure of the differential pressure overflow valve, the differential pressure overflow valve is opened, and the oil directly flows back to the oil tank through the differential pressure overflow valve.
As shown in fig. 1, one end of the filter 2 is connected to the hydraulic oil tank 4 through a pipeline, a first end of the differential pressure relief valve 3 is connected to one end of the filter 2 through a pipeline, a second end of the differential pressure relief valve 3 is connected to the other end of the filter 2 through a pipeline, and a third end of the differential pressure relief valve 3 is connected to the hydraulic oil tank 4 through a pipeline.
The beneficial effect of adopting the further technical scheme is that: the pressure difference between the inlet and the outlet of the filter is increased along with the gradual increase of the pollutant particles contained in the filter, when the front and rear pressure difference of the filter is increased to a set value, the pressure difference overflow valve is opened, the system is unloaded, hydraulic oil returns to the oil tank through the pressure difference overflow valve, and downstream components of the hydraulic system stop working, so that the filter is protected from being damaged, and the filter is prevented from being failed to pollute the downstream components.
As shown in fig. 1, one end of the filter 2 is further connected to the hydraulic oil tank 4 by a pump 5.
The beneficial effect of adopting the further technical scheme is that: the pump is a system power element and is used for providing high-pressure oil for the system. The filter is connected with the pump and downstream components and parts and plays a role in filtering oil.
As shown in fig. 1, further, the pump 5 is connected to the hydraulic oil tank 4 through an oil suction filter 6.
The beneficial effect of adopting the further technical scheme is that: the oil suction filter is arranged and used for filtering oil from the oil tank to the pump and ensuring the cleanliness of the oil entering the pump. The oil tank plays the roles of storing hydraulic working media required by the hydraulic transmission system, dissipating heat, precipitating pollutants and the like.
As shown in fig. 1, a check valve 7 is further connected to the other end of the filter 2, and the check valve 7 is used for connecting with the downstream hydraulic system 1.
The beneficial effect of adopting the further technical scheme is that: and the check valve is used for preventing the oil liquid of the hydraulic system from flowing back to the filter.
The utility model provides a filter protection device for carry out the failure protection to high pressure filter, when high pressure filter entry and outlet pressure difference were greater than the pressure that the pressure difference overflow valve set for, the pressure difference overflow valve was opened, hydraulic system off-load, hydraulic oil direct oil return tank. The filter is protected, and the hydraulic oil with impurities can be prevented from flowing to the downstream to pollute downstream parts. Meanwhile, if the filter element is not replaced by a user, the downstream parts of the whole hydraulic system stop working, and the user is forced to replace the filter element.
The utility model discloses a filter protection device mainly includes: the system comprises a pump, a filter, a one-way valve, a multi-way valve, a hydraulic motor, an oil cylinder, a differential pressure overflow valve, an oil absorption filter and a hydraulic oil tank. The downstream hydraulic system is composed of the multi-way valve, the hydraulic motor and the oil cylinder, and firstly, high-pressure oil from the pump enters the downstream hydraulic system after being filtered by the filter. The high-pressure oil passes through the one-way valve and the multi-way valve to control the hydraulic motor and the hydraulic oil cylinder to act.
When the pressure difference between the inlet and the outlet of the high-pressure filter does not reach a set value, the hydraulic oil is introduced into a downstream hydraulic system by the pressure difference sensor, and the hydraulic system works normally. The pressure difference between the inlet and the outlet of the filter rises along with the gradual increase of pollutants contained in the filter, when the pressure difference reaches the set pressure of the pressure difference overflow valve, the pressure difference overflow valve is automatically opened under the action of hydraulic pressure, hydraulic oil directly flows back to the oil tank, the oil does not flow into downstream parts, a downstream hydraulic system stops working, and meanwhile the check valve prevents the oil cylinder from flowing back due to the action of gravity to cause certain risks. The high-pressure filter can be prevented from being damaged due to overhigh pressure difference, and unfiltered hydraulic oil can be prevented from flowing into a downstream system to pollute downstream parts, so that downstream precise multi-way valves, hydraulic motors and the like are damaged.
When a user replaces the filter element, the pressure difference between the inlet and the outlet of the filter is normal, the pressure difference overflow valve is closed, high-pressure oil enters a downstream hydraulic system through the filter and the one-way valve, and the hydraulic system returns to normal work.
The filter screen of the filter is protected from being damaged when the front-back pressure difference is large; protecting the downstream parts of the filter from pollutants; force the user to change the filter core, guarantee the cleanliness of hydraulic system in the use.
As shown in fig. 2, in addition, the present invention provides a hydraulic system, including a filter protection device of any one of the above, further comprising: the filter 2, the hydraulic oil tank 4, the hydraulic motor 9 and the oil cylinder 10 are respectively connected with the multi-way valve 8 through pipelines.
Adopt the utility model discloses technical scheme's beneficial effect is: when the pressure difference between the inlet and the outlet of the filter is larger than the set pressure of the differential pressure overflow valve, the differential pressure overflow valve is opened, the hydraulic system is unloaded, and the hydraulic oil directly returns to the oil tank. The filter screen of the protection filter can not be damaged when the front-back pressure difference is large, so that impurities are prevented from entering a downstream hydraulic system to pollute downstream parts, and the damage of downstream hydraulic components is avoided. Meanwhile, if the filter element is not replaced by a user, the downstream parts of the whole hydraulic system stop working, and the user is forced to replace the filter element.
The hydraulic system is a downstream hydraulic system. The P port of the multi-way valve is connected with the one-way valve, the T port of the multi-way valve is connected with the hydraulic oil tank, the A1 port and the B1 port of the multi-way valve are respectively connected with two ends of the hydraulic motor, and the A2 port and the B2 port of the multi-way valve are respectively connected with two ends of the oil cylinder. The ports a1 and B1 of the multiplex valve are connected to the ports a1 and B1 in the multiplex valve, respectively, and the ports a2 and B2 of the multiplex valve are connected to the ports a2 and B2 in the multiplex valve, respectively. The b0 port of the multiplex valve is connected with the M port of the multiplex valve, the T port of the multiplex valve and the P port of the multiplex valve respectively.
The utility model provides a hydraulic system, hydraulic system are filter failure protection control system, and along with the filter holds the pollution granule and progressively increases, the filter entry also can increase thereupon with outlet pressure difference, and when the filter front and back pressure difference risees the setting value, the pressure difference overflow valve was opened, and the system off-load, hydraulic oil return tank, hydraulic system low reaches components and parts stop work not only protect the filter not receive the damage, prevent moreover that the filter from becoming invalid and polluting low reaches components and parts.
The method specifically comprises the following steps: the pump is a system power element and provides high-pressure oil for the system. The high-pressure filter is connected with the pump and downstream components and parts and plays a role in filtering oil. The check valve is used for preventing the oil liquid of the hydraulic system from flowing back to the high-pressure filter. The multi-way valve is used for controlling the hydraulic system to be in an unloading state when the b0 is not electrified; when b0 is electrified, the hydraulic motor and the oil cylinder are controlled to act. The hydraulic motor is used for controlling the hydraulic motor to rotate when the b0 is electrified and the a1 is electrified; when the b0 is electrified, the b1 is electrified to control the hydraulic motor to rotate in the other direction. The oil cylinder is used for controlling a piston rod of the oil cylinder to extend out when the b0 is electrified and the a2 is electrified; when b0 is electrified and b2 is electrified, the piston rod of the control oil cylinder retracts. And the differential pressure overflow valve is used for opening when the differential pressure between the inlet and the outlet of the high-pressure filter reaches the set pressure of the differential pressure overflow valve, and the oil directly flows back to the oil tank through the differential pressure overflow valve. The oil absorption filter is used for filtering oil from the oil tank to the pump, and the cleanliness of the oil entering the pump is guaranteed. The oil tank plays the roles of storing hydraulic working media required by the hydraulic transmission system, dissipating heat, precipitating pollutants and the like.
Additionally, the utility model also provides a vehicle, including the aforesaid a hydraulic system.
Adopt the utility model discloses technical scheme's beneficial effect is: when the pressure difference between the inlet and the outlet of the filter is larger than the set pressure of the differential pressure overflow valve, the differential pressure overflow valve is opened, the hydraulic system is unloaded, and the hydraulic oil directly returns to the oil tank. The filter screen of the protection filter can not be damaged when the front-back pressure difference is large, so that impurities are prevented from entering a downstream hydraulic system to pollute downstream parts, and the damage of downstream hydraulic components is avoided. Meanwhile, if the filter element is not replaced by a user, the downstream parts of the whole hydraulic system stop working, and the user is forced to replace the filter element.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (7)
1. A filter protection device, comprising: the filter (2) and the differential pressure overflow valve (3) are respectively connected with the hydraulic oil tank (4) through pipelines, and the differential pressure overflow valve (3) is connected with the filter (2) in parallel.
2. A filter protector as claimed in claim 1, characterized in that one end of the filter (2) is connected to the hydraulic tank (4) via a pipeline, a first end of the differential pressure relief valve (3) is connected to one end of the filter (2) via a pipeline, a second end of the differential pressure relief valve (3) is connected to the other end of the filter (2) via a pipeline, and a third end of the differential pressure relief valve (3) is connected to the hydraulic tank (4) via a pipeline.
3. A filter protection device according to claim 2, characterized in that one end of the filter (2) is connected to the hydraulic tank (4) by means of a pump (5).
4. A filter protection device according to claim 3, characterised in that the pump (5) is connected to the hydraulic tank (4) via an oil suction filter (6).
5. A filter protection device according to claim 1, characterized in that a non-return valve (7) is connected to the other end of the filter (2), said non-return valve (7) being adapted to be connected to a downstream hydraulic system (1).
6. A hydraulic system comprising a filter protector according to any one of claims 1 to 5, further comprising: the filter comprises a multi-way valve (8), a hydraulic motor (9) and an oil cylinder (10), and the filter (2), a hydraulic oil tank (4), the hydraulic motor (9) and the oil cylinder (10) are respectively connected with the multi-way valve (8) through pipelines.
7. A vehicle comprising a hydraulic system as claimed in claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220975273.8U CN217152507U (en) | 2022-04-25 | 2022-04-25 | Filter protection device, hydraulic system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220975273.8U CN217152507U (en) | 2022-04-25 | 2022-04-25 | Filter protection device, hydraulic system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217152507U true CN217152507U (en) | 2022-08-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220975273.8U Active CN217152507U (en) | 2022-04-25 | 2022-04-25 | Filter protection device, hydraulic system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217152507U (en) |
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2022
- 2022-04-25 CN CN202220975273.8U patent/CN217152507U/en active Active
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Address after: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee after: Weichai Lovol Intelligent Agricultural Technology Co.,Ltd. Address before: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee before: Weichai leiwo Heavy Industry Co.,Ltd. |